2. According to the Paper Aircraft Association, a paper airplane thrown in space will not fly; it will float in a straight line. Unless it hits an object, it could literally float forever (see Resources). Wingspan 3. The record wingspan of a paper airplane is 40 feet and 10 inches. The craft flew over 114 feet before crashing into a wall. Education 4. Scientists, engineers and students use paper airplanes to study aerodynamics.
Any type of trauma or injury to the testicles can cause severe pain and discomfort. The most common mechanism of testicular trauma occurs from blunt trauma (~85%), which can occur from sports injuries, a direct kick to the area, car accidents, and straddle injuries.
If surgery is performed within 6 hours, most testicles can be saved. Mild pain may be caused by fluid collection in the scrotum, such as: Enlarged veins in the scrotum ; Cyst in the epididymis that often contains dead sperm cells (spermatocele) Fluid surrounding the testicle ; Pain in the testicles may also be caused by a hernia or kidney stone. Testicular cancer is almost always painless. But any testicle lump should be checked out by your health care provider, whether or not there is pain.